Are you 21 and over….?

…and I don’t mean age but male ejaculation. Yes 21 a month is the magic number to reduce cancer risks as in Spanish health article this past Friday.

Now for vannamei shrimp we know that sperm sacs, after ejaculation or removal for artificial insemination (AI), take around 10 days to regenerate.

Viability of new sperm is better if male vannamei shrimp are kept at lower temperatures during regeneration.

Interestingly when the natural growth plateau in culture hits also around the time one can noting male sperm sacs forming although sexual differentiation can be noted earlier.

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